Year 3 - Maths
Solving problems involving addition and subtraction
Review strategies for adding and subtracting across 10
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will be reviewing and securing previous knowledge of adding 3 addends, understanding they can be added in any order and combined in different ways to bridge through 10
Lesson Summary
You will learn to solve problems using addition and subtraction, including bridging through ten.
Key Notes
- Different subtraction calculations need different strategies.
- Different addition calculations need different strategies.
- Number facts help solve addition and subtraction problems.
Vocabulary To Learn
- Minuend: The minuend is the number being subtracted from.
- Subtrahend: A subtrahend is a number subtracted from another.
- Difference: The difference is the result after subtracting one number from another.
- Sum: The sum is the total when numbers are added together.
- Partition: Partition means splitting a number into smaller parts.
Common Mistakes To Avoid
- Difference can only be found by subtracting the subtrahend from the minuend.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Different subtraction calculations need different strategies. Different addition calculations need different strategies.
2. Use this key word in a maths sentence and explain it clearly. 'Minuend'
The minuend is the number being subtracted from. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Difference can only be found by subtracting the subtrahend from the minuend. Correction: Subtract the subtrahend from the minuend when they are far apart. When close together, find the difference counting up from the subtrahend.
More Lessons In This Unit
- Add 3 numbers together in different contexts Study Guide
- Add 3 numbers together using doubles and near doubles Study Guide
- Add three addends by finding pairs that total 10 Study Guide
- Add three addends efficiently using a range of strategies Study Guide
- Addition by bridging through 10 Study Guide
- Numbers can be added in any order Study Guide
- Subtracting numbers that bridge through 10 Study Guide
- Subtracting small numbers Study Guide
- Subtracting to and from 10 Study Guide
Browse all guides in the Year 3 Maths guide library.